Both jaws, opened up - upper jaw is above (the green foam is placeholder for the tongue - they didn't have pink at the fabric store...).

Both jaws again.

Outside left side - notice the sharp edges that would cut into the cheek if he'd had a noseband pressing from the outside.

Looking inside from the back - notice the sharp edges on his lower teeth. Also, you rarely get to see what the upper palate, nasal cavity and sinuses look like from the inside!

The wave that formed on the bottom teeth slowly pushed the top teeth into these painful gaps.

The bottom teeth should have been floated down level, front-to-back and side-to-side.

A closer view of the gaps pushed/worn into the upper teeth.

Old food was packed rock-hard into these gaps, and the bone was deteriorating beneath the old food and between the teeth.